Icon for a portion of a display screen



FIG. 1 is a front view of an icon for a portion of a display screen showing the new design in a first embodiment; and,

FIG. 2 is a front view of an icon for a portion of a display screen showing the new design in a second embodiment.

The broken lines showing the display screen, and plus symbol in the second embodiment, are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an icon for a portion of a display screen, as shown and described. 